mirror of
https://github.com/LadybirdBrowser/ladybird.git
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647cfcb641
Start capturing the sample stacks at the EIP/EBP of the pre-empted thread instead of capturing EBP in the sampling function itself.
94 lines
2.8 KiB
C++
94 lines
2.8 KiB
C++
/*
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* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include <Kernel/KBuffer.h>
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#include <Kernel/KResult.h>
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namespace Kernel {
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class KBufferBuilder;
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struct [[gnu::packed]] MallocPerformanceEvent {
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size_t size;
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FlatPtr ptr;
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};
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struct [[gnu::packed]] FreePerformanceEvent {
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size_t size;
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FlatPtr ptr;
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};
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struct [[gnu::packed]] PerformanceEvent {
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u8 type { 0 };
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u8 stack_size { 0 };
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u32 tid { 0 };
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u64 timestamp;
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union {
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MallocPerformanceEvent malloc;
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FreePerformanceEvent free;
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} data;
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static constexpr size_t max_stack_frame_count = 32;
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FlatPtr stack[max_stack_frame_count];
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};
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class PerformanceEventBuffer {
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public:
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PerformanceEventBuffer();
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KResult append(int type, FlatPtr arg1, FlatPtr arg2);
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KResult append_with_eip_and_ebp(u32 eip, u32 ebp, int type, FlatPtr arg1, FlatPtr arg2);
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void clear()
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{
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m_count = 0;
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}
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size_t capacity() const
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{
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if (!m_buffer)
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return 0;
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return m_buffer->size() / sizeof(PerformanceEvent);
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}
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size_t count() const { return m_count; }
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const PerformanceEvent& at(size_t index) const
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{
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return const_cast<PerformanceEventBuffer&>(*this).at(index);
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}
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OwnPtr<KBuffer> to_json(ProcessID, const String& executable_path) const;
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bool to_json(KBufferBuilder&, ProcessID, const String& executable_path) const;
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private:
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PerformanceEvent& at(size_t index);
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size_t m_count { 0 };
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OwnPtr<KBuffer> m_buffer;
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};
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}
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